Instead of a global type enum and bitfield, all types now have their own
love::Type static member. This means they automatically assign their ids, build
their bitsets, etc. As a bonus, it simplifies wrapper code since most functions
already know which type they're pushing to or getting from lua, so they can
directly get the static member (if it's called 'type').
--HG--
branch : minor
Also allow arrays of images/samplers in shaders, although driver support is iffy and you have to index into the array using a compile-time constant (which might exclude loop indexing).
--HG--
branch : minor
- Removed love.graphics.set/getCanvas, Canvas:renderTo, Canvas:newImageData, love.graphics.clear, love.graphics.discard, and love.graphics.newScreenshot.
- Added love.graphics.beginPass and love.graphics.endPass. All rendering must happen within a pass. love.draw is now called while a render pass to the main screen is active.
- Added love.graphics.renderPass, which is a wrapper for begin/endPass which calls the supplied function argument in between a begin/end. This is similar to the old Canvas:renderTo.
- Added love.graphics.isPassActive, getPassCanvases, getPassWidth, getPassHeight, and getPassDimensions.
- Added love.graphics.captureScreenshot.
- Added a new love.run callback love.drawpasses, which is called after love.update and before love.draw. It is the place to render to Canvases using beginPass or renderPass, since love.draw now always draws to the main screen.
- Renamed the ‘canvasswitches’ field in the table returned by love.graphics.getStats to ‘renderpasses’.
love.graphics.beginPass has the following variants (and renderPass mirrors them with an additional function argument at the end):
- love.graphics.beginPass(), begins rendering to the main screen without clearing it.
- love.graphics.beginPass(r, g, b [, a]), begins rendering to the main screen and clears the screen to the specified color.
- love.graphics.beginPass(canvas [, willstencil]), begins rendering to the specified Canvas without clearing it. love.graphics.stencil can only be used within the Canvas if ‘willstencil’ is true.
- love.graphics.beginPass(canvas, r, g, b [, a] [, willstencil]), beings rendering to the specified Canvas and clears it to the specified color. love.graphics.stencil can only be used within the Canvas if ‘willstencil’ is true.
- love.graphics.beginPass(info), where ‘info’ is a table in the following form:
{
{canvas [, r, g, b, a]}, — A canvas and an optional color to clear the Canvas to when the pass begins.
{canvas2, [r, g, b, a]}, — Additional Canvases and optional clear colors for multi-canvas rendering.
…,
stencil = false, — Optional boolean field to specify whether love.graphics.stencil is allowed within this pass. False by default.
}
The pass info table can be created once up-front and used for multiple beginPass/renderPass calls.
love.graphics.endPass can take an optional callback function argument, which causes endPass to capture the contents of the Canvas drawn to in the render pass to a new ImageData and passes it to the supplied function (this replaces Canvas:newImageData). This does not work on the main screen.
love.graphics.captureScreenshot replaces love.graphics.newScreenshot. It takes a callback function argument which causes love.graphics.present to capture the contents of the screen to a new ImageData and passes it to the supplied function. captureScreenshot can only be called before drawing to the main screen begins in the current frame (e.g. in love.keypressed, love.update, etc.)
--HG--
branch : minor
Currently exposed formats are rgba8 and rgba16 (normalized), and rgba16f and rgba32f (floating-point). Some systems, especially mobile ones, won't support every format when creating a love.graphics Image. Use love.graphics.getRawImageFormats to check for support.
love.image.newImageData now takes an optional format parameter as its third argument when creating an empty sized ImageData. It defaults to rgba8.
16-bit PNGs, .hdr images, and floating-point OpenEXR images can now be loaded via love.image.newImageData and love.graphics.newImage.
--HG--
branch : minor
Gamma-correct blending and shader math can be enabled globally via the new 't.gammacorrect' boolean flag in love.conf.
The new function love.graphics.isGammaCorrect will return true if it was requested in love.conf and is supported on the system.
When gamma correct rendering is enabled, colors (including the colors of pixels from images) are automatically converted from sRGB to linear RGB before use. When drawing to the main screen or to a canvas with the 'normal' or 'srgb' format, the final output colors of pixel shaders are automatically converted from linear RGB to sRGB after blending and before the color is stored in the pixel.
This lets the rendering pipeline do math using linear RGB values for colors rather than sRGB values, so the math is correct, without making users of the APIs manually linearize their colors with the love.math.gammaToLinear function (which still exists). The final output of the screen is encoded as sRGB, which is what systems expect. Canvases (except when otherwise requested) store their contents with sRGB encoding for increased precision with darker colors.
the 'srgb' window setting flag has been removed, as well as the 'srgb' image flag. A new image flag 'linear' has been added, which when set to true will cause the colors of the image to always be treated as linear RGB rather than sRGB, when gamma-correct rendering is enabled.
A new function 'Shader:sendColor' has been added, which has the same argument structure as 'Shader:send' but expects colors in the range of [0, 255]. When gamma-correct rendering is enabled it automatically gamma-corrects the given colors (by applying gammaToLinear to them.)
New shader code functions have been added: gammaToLinear, linearToGamma, gammaCorrectColor, and unGammaCorrectColor. When gamma-correct rendering is enabled, the LOVE_GAMMA_CORRECT #define is set and gammaCorrectColor and unGammaCorrectColor are aliases for gammaToLinear and linearToGamma respectively, otherwise the functions do nothing.
The new shader functions have 'precise' and 'fast' variants. If the LOVE_PRECISE_GAMMA define is set, then the normal functions default to the precise variants, otherwise they default to the fast variants. Currently the define is set in vertex shaders and not set in pixel shaders.
The default per-vertex color is automatically gamma-corrected by LÖVE when gamma correct rendering is enabled, but any custom named per-vertex attribute specified with the new custom attribute Mesh functionality won't be, unless 'gammaCorrectColor' or similar functions are explicitly used (preferably inside the vertex shader code that has the custom attribute.)
Bart van Strien
Alex Szpakowski
Adam M